JP2901815B2 - Method for producing polyester grain fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a polyester grain fabric. More specifically, the present invention relates to a method for producing a polyester crimped woven fabric which has a good weaving property at the time of weaving and a good crimping property at the time of crimping.

[0002]

2. Description of the Related Art In order to produce a textured fabric from a polyester multifilament, the multifilament needs to have a thickness of about 30%.
After giving a strong twist of 00 turns / m, a steaming treatment is performed to temporarily fix the twisting property of the twist to enhance the weaving property of the strong twisted yarn, and then a sizing process is performed. In general, a method is used in which relaxation treatment (hereinafter sometimes referred to as RX treatment) in water is performed to re-exhibit the revolving property of the temporarily fixed strong twist yarn and to remove the paste. Then, due to the revolving property that is re-expressed at this time, an uneven grain is generated in the cloth.

[0003]

However, in the case of producing a polyester grain fabric by the above method, if a polyester fiber having a boiling water shrinkage of 7 to 9% or more is used, the strength during the RX treatment is reduced. The revolving property of the twisted yarn is reduced, and the residual torque is also weakened.

Heretofore, as a method of reducing the boiling water shrinkage of polyester fibers, a method of increasing a heat setting temperature or a method of performing heat setting while relaxing is known. However, in the case of polyester fibers to which a sizing agent is applied, an oil agent containing a mineral oil or a monohydric ester compound as a main component is applied to suppress peeling and falling off of the sizing agent. Not only is it not suitable for heat setting, but also there is a problem that yarn breakage tends to occur frequently during twisting. When an oil agent such as coconut oil or rapeseed oil or the like having a high molecular weight as a main component such as coconut oil or rapeseed oil is applied in order to improve such heat resistance, scum such as glue drop easily occurs in the weaving process. As a method for eliminating such a size drop, a method of applying an oil agent containing a mineral oil as a main component after heat setting has also been proposed. However, this method is preferable in terms of equipment cost, operation management, and a work environment due to oil agent scattering. It is hard to say.

[0005] On the other hand, the method of heat setting while relaxing is not a preferable method because the fiber is run while relaxing the tension after stretching, so that it is necessary to install a tension adjusting roller, which increases the equipment cost.

The present invention has been made on the background of the above-mentioned prior art, and an object of the present invention is to provide a method for inexpensively producing a polyester crimped fabric having good crimp standing.

[0007]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, it has been found that a polyester fiber which is drawn and heat-set after an oil agent having a specific composition is applied has a stable process during weaving. The present invention was found to be able to obtain an excellent crimped woven fabric at a low cost, which is excellent and suppresses fluff generation during strong twisting and falling off of the paste during weaving.

That is, according to the present invention, a polyester fiber is melt-spun, an oil agent is applied, and then a polyester fiber which is drawn and heat-set so as to have a boiling water shrinkage ratio of 5% or less is subjected to strong twisting and sizing, and is woven. Then, in the method for producing a textured fabric in which the fabric is subjected to a graining treatment, the oil agent contains the following (A) to (C) as essential components and simultaneously satisfies the formulas (I) to (III). (A) Component Aliphatic monohydric alcohol ester having a molecular weight of 550 to 750 and a liquid weight at room temperature (B) Component Aromatic ester liquid at room temperature represented by the following formula:

[0009]

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Wherein R ₁ and R ₂ represent an alkyl group having 8 to 25 carbon atoms, A represents an alkylene group having 2 to 4 carbon atoms, and n and m represent an integer of 1 or 2. (C) Component Alkylene oxide adduct of triglyceride which is liquid at normal temperature and has at least one hydroxyl group in the molecule. (I) W _A + W _B = 20 to 75 (II) W _C = 2 to 15 (III) W _A / W _B = 95/5 to 60/40 [where W _A , W _B and W _C are (A), (B),
And the content (% by weight) of the component (C) with respect to the oil agent active ingredient. ] Is provided.

In the present invention, it is necessary to maximize the re-expression of the revolving property in the woven fabric in order to exhibit the excellent crimp standing and crimp morphology. It is important that the ratio be 5% or less, preferably 3% or less.

In order to obtain such a polyester fiber,
It is important to perform heat setting at a temperature of 170 ° C. or more, preferably 190 ° C. or more after stretching. But on the other hand,
In order to weave after gluing, it is said that it is preferable to apply a mineral oil and an oil agent having a low molecular weight monohydric ester as a main component from the viewpoint of preventing the adhesive agent from falling off. When the heat treatment is carried out at a high temperature, a large amount of smoke is generated and the working environment is remarkably deteriorated, and the amount of tar is increased to deteriorate the quality of the obtained product.

The inventors of the present invention have repeatedly studied polyester yarns which are excellent in the crimping property and the adhesive properties of the sizing agent, the twisting property during strong twisting, and the processing properties during weaving. It has been found that the one obtained by applying a specific amount of the oil agent and then performing the stretching heat setting is optimal.

That is, in the present invention, the above (A) to (C)
After imparting an oil which contains the components as essential components and simultaneously satisfies the formulas (I) to (III), the boiling water shrinkage ratio is 5%.
It is important to set the stretching heat so as to be as follows.

First, the aliphatic monohydric ester (A) is an ester compound obtained from a monohydric higher alcohol and a monohydric or dihydric aliphatic carboxylic acid, and has a molecular weight of 5
It must be 50 to 750, preferably 600 to 700, and be liquid at room temperature. Specifically, higher alcohols having 20 to 34 carbon atoms are used as monohydric higher alcohols, and higher fatty acids such as stearic acid, oleic acid and palmitic acid or dibasic acids such as adipic acid, sebacic acid and thiodipropionic acid are used. And monoesters or diester compounds such as isoeicosyl stearate, isopentacosyl palmitate, isopentacosyl oleate, isopentacosyl erucinate, etc., and diisostearylthio. Diesters such as dipropionate, dioleyl adipate, diisostearyl sebacate and the like can be exemplified.

Here, only aliphatic monohydric alcohol esters having a molecular weight exceeding 750 or becoming solid at ordinary temperature, or polyhydric alcohol esters having no hydroxyl group such as coconut oil and rapeseed oil, which are triglycerides, are A
When used as a component, undesired increase in glue loss during weaving and increase in friction between the traveling yarn and the yarn guide during yarn production, resulting in the occurrence of single yarn breakage.

In the case of an aliphatic monohydric alcohol ester having a molecular weight of less than 550, heat is liable to evaporate due to heat at the time of spinning, and smoke is generated, which not only causes pollution of the working environment,
It is not preferable because tar is formed on a heat roller, a yarn guide or the like, which may cause breakage of a single yarn, and may also cause fluffing during twisting.

The aromatic ester (B) is a diester compound represented by the following general formula, which is obtained by adding an alkylene oxide to bisphenol A and then esterifying with an aliphatic monocarboxylic acid.

[0019]

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In the formula, R ₁ and R ₂ represent an alkyl group having 8 to 25 carbon atoms, A represents an alkylene group having 2 to 4 carbon atoms, and n and m represent an integer of 1 or 2. When the number of carbon atoms of R ₁ and R ₂ is less than 8, lubricity is reduced, abrasion resistance is deteriorated, and fluff of the original yarn and fluff of the twisted yarn tend to increase. On the other hand, when the carbon number exceeds 25, it is not preferable because it is difficult to obtain industrially. In addition, the number of added moles of alkylene oxide (n
Or, when m) is 0, the properties of the aromatic ester become solid at room temperature, which impairs the adhesiveness of the sizing agent in the sizing step. Increases, and the glue film is plasticized, which causes a problem that the protective action of the glue film formed on the yarn is reduced and the weaving efficiency is deteriorated.

As the component (B) usually preferably used, there can be mentioned, for example, dilaurate of bisphenol A added with 2 moles of ethylene oxide.

In the oil agent used in the present invention, the sum of the components (A) and (B) described in detail above is 20 to 75% by weight, preferably 30 to 6% by weight, based on the active ingredient of the oil agent.
It must be contained at 5% by weight. If the content is less than 20% by weight, the lubricity required for yarn production cannot be provided, and the occurrence of single yarn breakage tends to increase,
In addition, there is little improvement effect on problems such as "glue removal" during weaving. On the other hand, if it exceeds 75% by weight, it is not preferable because it causes difficulty in the emulsion stability of the oil agent system.

In the present invention, the weight ratio (A / B) between the component (A) and the component (B) is from 95/5 to 60/4.
Must be in the range of 0. The proportion of the B component is A
If the amount is less than 5% by weight with respect to the total amount of B and B, the heat resistance of the oil agent is reduced, and if it exceeds 40% by weight, the friction of the yarn increases, As a result, the adhesiveness of the glue film on the yarn is reduced, or the cohesive force of the glue film is weakened and the sizing effect is weakened.

The alkylene oxide adduct of triglyceride having a hydroxyl group in the molecule, which is another essential component of the oil agent used in the present invention, needs to be liquid at normal temperature. The content thereof must be 2 to 15% by weight, preferably 5 to 10% by weight, based on the active ingredient of the oil agent.

The present invention is intended to dissolve such an oligomeric glyceride alkylene oxide adduct having excellent compatibility with a polyester oligomer (mainly a cyclic trimer) and to precipitate an oligomer precipitated by a treatment such as heating during the production of polyester fiber in an oil agent system. It is presumed that it has been found that the effect of suppressing the accumulation of oligomer scum on rollers, yarn guides, and the like is great. Therefore, if the amount is too small, these effects are not exhibited, while if it is too large, the effect of the above-mentioned component A (degreasing resistance) is reduced, and the friction between the running yarn and the yarn conductor is increased. It is not preferable because friction increases.

The alkylene oxide added in the component (C) is an alkylene oxide having 2 to 4 carbon atoms, and particularly preferably ethylene oxide. The number of moles to be added is preferably 4 to 30 mol, particularly preferably 8 to 15 mol, based on glyceride having a hydroxyl group. If the number of added moles is out of this range, it is presumed that the solubility of the polyester oligomer is reduced, but the effect of suppressing the accumulation of oligomer scum tends to be reduced.

Examples of the component C include alkylene oxide adducts of hydrogenated castor oil and monoesters or diesters of these aliphatic monocarboxylic acids. Specifically, POE (8) hydrogenated castor oil ether (POE (n) indicates that the number of moles of oxyethylene oxide added is an average of n moles; the same applies hereinafter), P
Preferred are OE (12) hydrogenated castor oil ether, POE (25) hydrogenated castor oil dilaurate and the like.

It goes without saying that other oil components may be contained within a range not to impair the object of the present invention. Such compounding agents include, for example, thioester-based leveling agents having heat resistance, emulsifiers for use as emulsions, antistatic agents for preventing static electricity, antioxidants for improving heat resistance, and extreme pressure lubrication of oils. And organic or inorganic additives for enhancing the properties and the oil film strength.

In order to apply such an oil agent to the polyester fiber, it is sufficient that the oil agent is applied after the spun yarn is solidified and before it is drawn. Usually, the oil agent is applied before the take-up roller. As a preferable means for applying, a method in which the above-mentioned oil agent is formed into an aqueous emulsion and applied via a metering oiling nozzle can be mentioned, but the applied amount is
0.3-1.0% by weight based on fiber weight as pure oil
It is preferable to improve the weaving efficiency and the like of the fiber obtained by the above.

The polyester fibers used in the present invention are:
The undrawn yarn provided with the above oil agent is obtained by drawing heat setting so that the boiling water shrinkage is 5% or less. For example, the sheet is drawn at a speed of 1300 m / min using a device as shown in FIG. 3, and then heat set at a temperature of 170 ° C. or more while drawing 3.0 times between the drawing roller and a drawing heat setting roller. I just need.

The polyester fiber thus produced is subjected to strong twisting with a twist coefficient K (number of twists (times / m) × √ (fineness)) of 15,000 or more according to a conventional method, followed by pasting and weaving. The resulting fabric is then treated, for example, at a temperature of 80-1.
It is immersed in hot water at 00 ° C. and embossed.

[0032]

According to the method of the present invention as described above, the hot water shrinkage, which was difficult to obtain by the conventional method, is 5%.
It is possible to obtain a polyester fiber having the following characteristics, in which scum generation during spinning, fluff generation during twisting, and paste drop during weaving are suppressed, and a polyester crimp woven fabric having good crimp standing can be easily and inexpensively produced. And its industrial value is extremely large.

[0033]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples. In the examples, the crimping property, the heat resistance, the guide scum, the fluffiness of the raw yarn, and the scum removed from the paste were each evaluated by the following methods.

(1) Heat resistance (smoke resistance, heat deterioration resistance) In the polyester fiber manufacturing process, the state of smoke generated from the heat setting heating roller and the state of tar generated around the roller are visually observed and the following criteria. It was determined by Smoke resistance ○ Smoke generation small △ 〃 Medium × Large Heat deterioration resistance ○ Low tar △ 〃 Medium × 〃 Large

(2) Guide scum In the polyester fiber production process, the amount of scum adhering to the yarn guide after passing through the heating roller for heat setting was visually determined. ○ Small scum △ 〃 Medium × 〃 Large

(3) Fuzzy yarns 160 yarns were collected, the number of fluffs (single yarn breaks) between each 200,000 m was counted, and the number of fluffs per 1 million m was obtained therefrom and judged as follows. . The number of fluff (ケ / 10 ⁶ m) ○ 0 to 0.5 △ 0.5 to 2.0 × 2.0 or more

(4) Twisted nap After 3,000 T / m of twist was applied to the raw yarn, the appearance of the nap was visually measured and judged according to the following criteria. Appearance fluff (ke / kg) ○ 0.5 or less △ 0.5 to 1.0 × 1.0 or more

(5) Paste scum As a substitute characteristic for the "paste bleeding" phenomenon in the actual weaving process, a part of the glue film on the surface of the yarn is affected by friction acting in the yarn axis direction of the sizing yarn. The evaluation was based on the frequency of peeling from the yarn surface.

A sizing yarn was obtained by sizing a polyester fiber with a sizing agent mainly composed of polyvinyl alcohol and polyacrylic acid ester by a usual roller sizing method so as to have a target adhesion amount of 5.0% by weight. Next, these 20 sizing yarns are arranged at equal intervals, fixed terminals are installed so that both ends are not disturbed, and one end is fixed by a chuck 4 as shown in FIGS.
A book weight 6 is applied and tension is applied to the entire sample through the pulley 5. In the figure, 1, 2 and 3 are reeds installed at 10 cm intervals, which are fixed to a movable table 7, and the movable table 7 can reciprocate in a width of 5 cm in parallel with the yarn axis. The sample sizing yarn is set so as to have an opening angle of 108 ° in the central reed 2 as shown in FIG.

Next, the movable table 7 is reciprocated right and left,
After making 10 reciprocations, the peeling state of the adhesive film in the rubbed portion between the reed and the yarn was carefully observed, and the ratio of the number of peeled samples per 20 samples was expressed by the following grade.

Here, the determination was made based on the average of the results of each of the three times. Number of peeled pieces Grade Less than 25%: Good 25 to 50%: Acceptable Exceeding 50%: Impaired Further, weaving was performed, and the results of visual evaluation of the adhesive scum were comprehensively judged and judged as adhesive scum. did. Glue scum ○ Small △ Medium × Large

(6) Graining The graining after the relaxation treatment and after finishing was visually judged. ◎ Extremely good ○ Good △ Somewhat insufficient × Not possible

(7) Residual torque The twist set after the twisting is performed by post-steaming heat treatment.
A 1.2-meter cutout is weighted at the center and 0.2 g / d, and both ends are combined. 2 depending on the torque of the yarn
Twist occurs in the folded yarn. This is cut off by 50 cm (the yarn has a test length of 1 m), the number of twists is measured by a twister, and the number is doubled.

(8) Boiling Water Torque The twisted set yarn was cut out in the same manner as the residual torque, and the center was weighed at 0.2 g / d to adjust both ends, and immersed in boiling water for 1 minute. , 25 cm cut (yarn sample length is 50 cm) 4 times this measure the number of twists in the test twist device
It is converted to boiling water torque per meter.

(9) Overall evaluation The following four stages were used. ◎ Extremely good ○ Good △ Somewhat insufficient × Not possible

[0046]

Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.65 was melted and discharged using the apparatus shown in FIG. 3 to form a 36-filament yarn. This thread was applied via an oiling roller so that the oil agent shown in Table 1 was 0.5% by weight. Thereafter, the film was preheated at 90 ° C. while being taken up at 1300 m / min with a take-up roller, and then stretched 3.0 times between the take-up roller and a stretch heat set roller while being drawn 13 times.
Heat setting at 0, 150, 170, 190 ° C and winding up 7
A 5d / 36f drawn yarn having a strength of 4.6 g / d was obtained.

The obtained drawn yarn was twisted at 3000 T / m using an Italian twisting machine, and then subjected to steam heat treatment at 85 ° C. for 30 minutes to temporarily fix the twist.

After arranging the strong twisted yarn for warp, a sizing agent for the acrylic yarn was applied at 3.0% to the yarn weight, while a strong twisted yarn without the sizing agent was used as the weft. Book / 25.4mm, weft 84 book / 2
Weaving was performed at a weave density of 5.4 mm. The resulting fabric is
After a relaxation treatment at 130 ° C. for 20 minutes using a liquid dyeing machine, a weight reduction treatment was carried out in a 35 g / l aqueous solution of sodium hydroxide at 100 ° C. to a weight loss rate of 18%. Next, using a disperse dye, dyeing was performed at 130 ° C. for 45 minutes, and after washing with water, a dry heat setting was performed at 170 ° C.

Table 2 shows the evaluation results of the obtained grain fabric.

[0050]

[Table 1]

[0051]

[Table 2]

From the above results, it can be seen that, according to the method of the present invention, the spinning properties, the twisting properties, the weaving properties, and the creasing properties are all extremely good.

[0053]

Example 2 Using the same apparatus as in Example 1, the oils shown in Table 3 were applied, stretched, heat-set at 190 ° C., and items other than graining property were evaluated. Table 4 shows the results.

[0054]

[Table 3]

[0055]

[Table 4]

As is evident from the above results, it is understood that by applying the oil agent according to the present invention, the yarn-making, twisting and weaving steps are remarkably improved.

[Brief description of the drawings]

FIG. 1 is a side view of a glue removal scum evaluation device.

FIG. 2 is a plan view of the glue removal scum evaluation device.

FIG. 3 is a schematic view of a direct drawing machine for spinning polyester used in Examples.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reed which rubs a thread 2 Reed which rubs a thread 3 Reed which rubs a thread 4 Thread fixing check 5 Pulley 6 Weight 7 Movable platform which reciprocates a reed 8 Thread 9 Cooling device 10 Oil supply device 11 Pull Take-up roller 12 Stretching heat set roller 13 Winding machine

Continuation of the front page (56) References JP-A-52-25147 (JP, A) JP-A-56-37311 (JP, A) JP-A-62-149941 (JP, A) JP-A-55-163260 (JP, A) JP-A-58-220822 (JP, A) JP-A-55-93835 (JP, A) JP-B-62-45337 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB Name) D06C 23/04 D01F 6/62 302 D03D 15/04 D06M 13/224 D06M 101: 32

Claims (1)

(57) [Claims] Claims: 1. A polyester fiber obtained by melt-spinning a polyester, applying an oil agent thereto, and weaving a yarn obtained by subjecting a polyester fiber which has been drawn and heat-set to strong twisting and sizing so as to have a boiling water shrinkage ratio of 5% or less, and thereafter the woven fabric A method for producing a textured fabric, wherein the oil agent contains the following (A) to (C) as essential components and simultaneously satisfies the formulas (I) to (III). Fabrication method. (A) Component Aliphatic monohydric alcohol ester which is liquid at normal temperature and has a molecular weight of 550 to 750 (B) Component Aromatic ester which is liquid at normal temperature and represented by the following formula: [However, R ₁ and R ₂ are an alkyl group having 8 to 25 carbon atoms;
Represents an alkylene group having 2 to 4 carbon atoms, and n and m represent an integer of 1 or 2. (C) Component Alkylene oxide adduct of triglyceride which is liquid at normal temperature and has at least one hydroxyl group in the molecule. (I) W _A + W _B = 20 to 75 (II) W _C = 2 to 15 (III) W _A / W _B = 95/5 to 60/40 [where W _A , W _B and W _C are (A), (B),
And the content (% by weight) of the component (C) with respect to the oil agent active ingredient. ]